[PATCH v2 0/2] uapi/samples: guard renameat2 flag macros

[Masaharu Noguchi]

Including `<linux/fcntl.h>` after libc headers leaves the renameat2 flag
macros stuck with libc's values, and our sample code in turn redefines
them when it includes the uapi header.  This little series makes the
uapi header resilient to prior definitions and ensures the sample drops
any libc remnants before pulling in the kernel constants.

Changes since v1 (based on feedback from David Laight):
- uapi change now checks the macro values and undefines mismatches
- sample code always undefines the macros up front and documents why

Link: https://lore.kernel.org/all/20251109071304.2415982-1-nogunix@xxxxxxxxx/

Masaharu Noguchi (2):
  uapi: fcntl: guard AT_RENAME_* aliases
  samples: vfs: avoid libc AT_RENAME_* redefinitions

 include/uapi/linux/fcntl.h | 15 ++++++++++++++-
 samples/vfs/test-statx.c   |  9 +++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)


base-commit: e9a6fb0bcdd7609be6969112f3fbfcce3b1d4a7c
-- 
2.51.1